POST /rephrase-for-contact

curl -X POST \
  https://yeoffsnpsacsnxphsokr.supabase.co/functions/v1/rephrase-for-contact \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "contact_id": "550e8400-e29b-41d4-a716-446655440000",
    "message": "Hey! Just wanted to check in and see how things are going with the project."
  }'

{
  "original": "Hey! Just wanted to check in and see how things are going with the project.",
  "rephrased": "Hi Jane, following up on the project timeline. Are we tracking toward the Q2 milestone?",
  "reasoning": "Removed casual opener and added specificity. Jane's profile indicates she values directness and measurable progress markers over social check-ins.",
  "credits_used": 0.1,
  "credits_remaining": 148.9
}